Thanks for your reply 
I tried this with a friend's internet connection because it uses PPPoE and it works perfectly.
But in my case, this is how I solved my problem:
http://i49.tinypic.com/2rm9p51.jpg <- port 4 is now WAN port
http://i50.tinypic.com/2wfmuza.jpg <- the protocol that I have used
http://i46.tinypic.com/2zjkegn.jpg <- new eth0.2 VLAN interface
But there is another problem, as you can see, there is no wireless interface, i don't know why but wifi ii not working, there is no wireless at all...
Here is a picture
http://i45.tinypic.com/iyflao.jpg
And how to install ugly patch, i want to enable USB, i downloaded ugly patch for sx763
(Last edited by gigabyte091 on 21 Jan 2013, 09:52)